CVE-2017-14471

CVE-2017-14471 describes a critical access control vulnerability in Allen Bradley Micrologix 1400 Series B FRN 21.2 and earlier firmware. An unauthenticated attacker can send specially crafted packets to perform read or write operations, leading to sensitive information disclosure, modification of settings, or alteration of ladder logic. With a CVSS score of 9.8 (Critical), this vulnerability has a network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While the EPSS score is relatively low, indicating a lower likelihood of exploitation compared to many CVEs, there is no public exploit code available, nor is there evidence of active exploitation or significant community discussion.